I would greatly appreciate your expert opinion on a technical question regarding extensive field monitoring of solar generator. The objective is to carry out a long-term, rather in-depth field monitoring of solar (DD) fridge installations for their long-term performance evaluation and programmatic learning about their operations- hence only a subset of all solar units would be monitored.
To monitor and evaluate a solar generator, the basic set up should probably track the solar exposure at the panel site with a pyranometer and the electrical output of the solar generator (should it be best voltage? intensity? power? a combination? is there a specific location where it should be measured?). Any related protocol or recommendation for specific data logger brand or toolkit is welcome.
Secondly, I am also wondering whether there are any other valuable elements to monitor, either as performance indicators of the solar generator or as key environmental factors that could impact the solar generator performance. For example, I wonder whether it is valuable to monitor the ambient temperature of the solar panel , or the temperature of the panel itself. I anticipate those complementary measurements might only be insightful in case of unexpected performance or issue as it might help identify the causes of the unexpected situation.
Looking forward to your thoughts,